Read the data sheet before selecting a component

I was desinging a circuit for my project where I used a BC547 transistor for switching purpose but where the collector current IC will be 500mA but the max collector current for that transistor was 100mA.

This is the mistake that I made, I should have chosen a transistor having IC max = 500mA, so this caused me two days even simple circuit took a long time and finally I thought to see the data sheet. where I discovered the IC max = 100mA. So friends out there its my experience form what I have learned. Next time I have to read the data sheet carefully. so if you design your own circuit then read the datasheet very carefully before selecting the components.